fix(sensors): move trigger initialization from __init___ to execute (#…

…33926)

in #33403, we move trigger initialization to __init__
which causes a failure for one uses template variable

(cherry picked from commit eaa6126)

airflow/sensors/date_time.py

@@ -87,11 +87,11 @@ class DateTimeSensorAsync(DateTimeSensor):
 
     def __init__(self, **kwargs) -> None:
         super().__init__(**kwargs)
-        self.trigger = DateTimeTrigger(moment=timezone.parse(self.target_time))
 
     def execute(self, context: Context):
+        trigger = DateTimeTrigger(moment=timezone.parse(self.target_time))
         self.defer(
-            trigger=self.trigger,
+            trigger=trigger,
             method_name="execute_complete",
         )
 

airflow/sensors/time_sensor.py

@@ -68,11 +68,11 @@ def __init__(self, *, target_time, **kwargs):
         )
 
         self.target_datetime = timezone.convert_to_utc(aware_time)
-        self.trigger = DateTimeTrigger(moment=self.target_datetime)
 
     def execute(self, context: Context):
+        trigger = DateTimeTrigger(moment=self.target_datetime)
         self.defer(
-            trigger=self.trigger,
+            trigger=trigger,
             method_name="execute_complete",
         )